Rail bond



April 30, 1929. w, F HART 1,710,873

RAIL BOND Filed Jan. 31, 1925 Patented Apr. 30, 1929.

UNITED STATES PATE T m-cs.)

WILLIAM F. H mor rrr'rseuncin. PENNSYLVANIA, names To vERoNA :rooL WORKS, or PITTSBURGH, rnnnsvrvnnrn, ,A oon-Ponarrcnion JPENLTSYLVANIA.

BAIL Bonny Application filed January 31, w 25.-- Seriatlidhfiflfil. l

The present inventionrelates broadly to bonds and more particularly to bonds adapted for use with railway and having generally resilient character adapting them for being clamped in position between the webs of the rail ends to be bonded and the fish plates used for completing the joints.

It has heretofore been proposed to construct rail bonds of the general character herein disclosed of resilient material having rail web-engaging points, the body of the bonds being curved either longitudinally, transversely or both, to increase the strength of the bond and insure a better contact between the ends thereof and the Webs of the rails.

As the bolts holding the fish plates in position are drawn up, the bonds are placed under a tremendous load having the eilect of giv ihg to the bonds a permanent set and of destroying their resiliency unless they are carefully constructed to meet all of the requirements imposed thereon. It will be apparent that the effectiveness of the bond established depends upon the resiliency of the material utilized, as in this manner the points can be more effectively driven into bonding relationship.

In some installations, the distance between bolt hole centers at the ends of the rails is comparatively short, thereby requiring the use of a bond having a small over-all length. In such installations, it Willbe apparent that proportionately the distance between the web of the rail and the inside of the fish plate or splice bar is much greater than in other installations, where the distance between the bolt hole centers is increased. By the present invention, there is provided a bond particularly adapted for use in installations where the bolt hole centers are close, although the utility of the invention is not limited in this respect and it is adapted for general application in the manner of bonds heretofore constructed.

In the accompanying drawings, I have shown for purposes of illustration only a preferred embodiment of the present invention, it being understood that the drawings do not define the limits of the invention, as changes may be made in the construction and operation disclosed without departing from the spirit of the invention or the scope of the broader claims. In the drawings:

figure I is a sectional vicwit-hrough a portion of a rail jointnshowing my improved track bond in position; 1 i

Figure is a side elevation of the construe-X i tion illustrated in Figure 1, the fish plate be ing removed and .the clamping bolts being shown 1n section Figure 3 is a perspective view of thejbond Figure 4 is a transverse sectionalyview through the bond at substantially the center portion thereof; and

Figure 5 is a longitudinalsectional View through the bond. i I

lieterring more particularly to Figures 1 and 2 of the drawings, there isshown a portion of z'track joint comprising rail sections and 3, the joint between which is bridged in the usual manner by fish plates or splice bars 4;. i

Between the center bolts?) which hold the fish plates or splice bars in position, irrespective of whether the distance between thereutcrs of these bolts is comparatively short or long, there is room for the insertion of a'track bond which is constructed in accordance with thepresent invention. Shelia bond will comprise a body of resilient material curved either longitudinally,transversely or both, the latter construction being illustrated in the drawgeneral charactcristicsis also preferably characterized in that it has an elongated ings. The bond, however, apart'froin these" hump 7, formed thereon. This hump is preferably of such construction that it provides an abrupt changeinsection in the bond with respect either to a transverse section as illustrated in Figure 4 or a longitudinal section as illustrated in Figure Where the bond has its main body portion curved transversely, a

transverse sectional viewthrough the central of one radius and having acurved portion constituting the elongated hump of'afldlf ferent radius, it being assumed that the bond,

as a whole, is provided With a longitudinal curvature.

I have found by actual tests thata bond having an elongated hump, whether the main portion of the bond be transversely curved,

and longitudinally. In such a bond, approxin'iately three times as much pressure is required to compress the bond one-quarter of an inch as compared to that required to compress a bond which is only curved transversely and longitudinally Without the elongated hulnpo The advantages of the present invention arise from the provision of a bond of the general character herein referred to having at least a portion of its body disposed out of the 15 plane of the remainder thereof, to provide a projecting hump preferably of elongated configuration.

I claim:

1. As an article of manufacture, a rail bond comprising a body portion arched in all directions, and means located at the crown of said body portion for resisting compression thereof.

2. A rail bond comprising a spring plate curved laterally and longitudinally, said plate having a projection extending from the convex face thereof.

In testimony whereof I have hereunto set my hand.

VILLIAM F. HART. 

